system worked flawlessly but only once.

Question

i have just installed my evo-one with the gm3 t harness, and 942 rf kit on a 2015 chevy silverado 2500hd with standard key and onstar. i got the remote start and locks to work during testing but after i buttoned up, being careful not to stress any wires, my locks are no longer functioning. the remote says it worked, i hear the relays clicking, and see the parking lights flash. if i try to start the truck it will successfully start and run for about 3 seconds before shutting down. i will get several flashes of the parking lights but then it will not try to start again. i have counted 2 and 4 flashes after a failed remote start and i have even seen "service theft detterent system" on my dash a time or two after a failed start.

Answer 1

Hello,

What is the S/N number on the back of the module?

Also please confirm all 3 brake lights function as they should on the vehicle.

Thank you.